/**
* Test if the current browser runs on a mobile device (smart phone, tablet, etc.)
*
- * @staticvar bool $is_mobile
- *
* @return bool
*/
function wp_is_mobile() {
- static $is_mobile = null;
-
- if ( isset( $is_mobile ) ) {
- return $is_mobile;
- }
-
if ( empty($_SERVER['HTTP_USER_AGENT']) ) {
$is_mobile = false;
} elseif ( strpos($_SERVER['HTTP_USER_AGENT'], 'Mobile') !== false // many mobile devices (all iPhone, iPad, etc.)